John Krasinski [1] and Jimmy Kimmel continued their annual prank tradition on Tuesday, only this time John took things up a notch by causing mischief all week long. Things got ridiculously funny when Jimmy found a pantsless Santa outside his office window, but that wasn't all. There was also a Winter wonderland and reindeer thrown in the mix. Last year, John had the assistance of his lovely wife, Emily Blunt [2], who helped him cover Jimmy's car in holiday wrapping paper [3] as retaliation for turning their house into Santa's village. Press play and prepare to crack up, then watch Matt Damon prank Jimmy [4] earlier this month.